Insulating board



Sept. 25, 1928. 1 D. FlNLEY INSULATING BOARD Filed Aug. 10, 1927 INl/E/V TOE DOZ/EQ Fl/VLEY {11s A Teen/EX Patented Sept. 25, 1928.

UNITED STATES PATENT OFFICE.

DOZIER FINLEY, OE BERKELEY, CALIFORNIA, ASSIGNOR TO THE PARAFFINE COM-PANIES, INC., OF SAN FRANCISCO, CALIFORNIA, A CORPORATION OF DELAWARE.

I INSULATING BOARD.

Application filed August 10, 1927. 7 Serial No. 212,009.

My invention relates to an insulating board of corrugated paper, and thebroad object of the invention is to provide a board of the characterdescribed with dead air spaces or pockets.

Another object of the invention is to provide a board of the characterdescribed with a filler to prevent the circulation of air along thefurrows of the corrugated sheet.

Another object of the invention is to provide a board of the characterdescribed with a series 'of spaced bands of filler to provide airpockets in the spaces between the bands.

Anotherobject of the invention is to provide a rigid board of thecharacter described and comprising adjacent corrugated sheets whichserve to reinforce each other.

Other objects of the invention together with the foregoing will be setforth in the following description of my preferred embodiment of meansfor practicing the invention, and which is illustrated in the drawingsaccompanying and forming part of the specification. It is to beunderstood that I do not limit myself to the showing made by the saiddescription and drawings, as I may adopt variations of my preferred formwithin the scope of my invention as set forth in the claims.

Referring to the drawings:

The figure is a. perspective view of the preferred embodiment of myboard, in which two sheets of corrugated paper are shown adjacent toeach other.

In terms of broad inclusion, my. invention comprises a sheet ofcorrugated paper, on each side of which. is. adhesively fastened a layerof plane paper. A number of dead air pockets is provided for by means ofa series of spaced bands of filler between the layers and across thefurrows of the corrugated sheet; thereby trapping and preventing thecirculation of air therethrough.

In greater detail, the insulating board of my invention comprises asheet of corrugated paper 2 having the furrows 3 and ridges 4:- On thesides of the paper 2, are adhesively fastened layers of plane paper 6and 7. A side of a second sheet of corrugated paper 8 is adhesivelyfastened to one of the layers of plane paper, so as to be adjacent tothe first sheet; while a layer of plane paper 9 is adhesively fastenedon the other side. In order to provide for a ment.

Means are provided for maintaining a plurality of dead air spaces orpockets 11 in the insulatin board. Between the layers of paper on thesides of the corrugated sheets and across the furrows is a series ofspaced bands 12 of filling material. A band is preferably provided foralong each edge of the sheet, while as many bands may be placed betweenthe edge bands as the conditions demand. It is thus seen that by placingthe filler across the furrows, air cannot circulate along them and deadair pockets arehence formed in the spaces 11 between the bands.

The filler may be of any insulating material such as a set cementitiousproduct, as lime or cement mix, a mixture of sawdust and Water glass, orinfusorial earth and a binding medium such as Water glass. However, itis preferred to use plaster of Paris, or a mixture of plaster of Parisand sawdust, due to thequick setting properties of the mix, When wateris added to the hemihydrate of calcium sulphate.

Although in the preferred embodiment of my invention, I have disclosedthe use of two sheets of corrugated paper adjacent to each other to forma single board, it is apparent that the spirit of the invention can becarried out by the use of only one sheet.

The sheets of plane paper may be omitted if the corrugated sheet withits spaced bands of filler across the furrows is snugly fitted within adouble wall structure such as a container having spaced walls, for thewall surface adjacent the sheet will provide the necessary means forinsuring the formation of dead air pockets. In this case, the corrugatedsheet may be made of corrugated tin, or any other sheet metal or sheetmatea filler comprising plaster of Paris between said layers and acrossthe furrows of the corrugated sheet.

3. An insulating board comprising a sheet of corrugated paper, a layerof plane paper on each side of the corrugated paper, and a fillercomprising hydrated plaster of Paris and sawdust between said layers andacross the furrows of the corrugated sheet.

4. An insulating board comprising a sheet of corrugated paper, a layerof plane paper on each side of the corrugated paper, and a series ofspaced bands of filler between said layers and across the furrows of thecorrugated sheet. 4

5. n insulating board comprising corvru ated sheets of paperadjacentside to side an with-the respective furrows and ridges I ,of thesheets in direct alinement, a layer of plane paper on each side of thesheets, and a filler between said layers and across the furrows of thecorrugated sheets.

6. An insulating board comprising corrugated sheets of paper adjacentside to side and with the respective furrows and ridges" of the sheetsin irect alinement a layer of plane paper on each side of the sheets,and a series of spaced bands of filler between said layers and acrossthe furrows of the spaced bands of filler across the furrows and betweenthe layer of plane paper and the corrugated sheet.

In testimony whereof, I have hereunto set P my hand.

DOZIER FINLEY.

